In defining project scope, it is important to be clear about the boundaries and interfaces with adjacent projects.

The way in which scope is managed depends upon the project life cycle. A high ­level scope is typically recorded in the business case in support of the chosen option and its investment appraisal.

Clearly defining what is in and out of scope prevents the risk of misunderstanding at a later point in the project that may lead to emerging issues and change requests.

During the scoping process, assumptions are documented to clarify the work that is part of the scope. And the detailed scope of work emerges from the decomposition of chosen option to meet the sponsors requirements.